CUET Mathematics 2025 14 May Shift 1 PYQs

The largest open interval, in which the function $f(x) = \frac{x}{x^2 + 1}$ increases, is

The maximum value of $\left(\frac{1}{x}\right)^x$ for $x > 0$ is

The function $f(x) = x^4 - 2x^2$ is increasing on